There are: 0.5*(15^2 -3*15) = 90 diagonals in a 15-agon polygon
It has 1,345,890 diagonals
There are 20 diagonals
There are five diagonals in a pentagon.
5 diagonals
A icosagon has 200 diagonals
It has 1,345,890 diagonals
24 diagonals
It has 2 Diagonals!!!
2 diagonals
There are 20 diagonals
20 diagonals
It has 27 diagonals
It has 9 diagonals
It has 2 diagonals
14 diagonals
A undecagon has 44 diagonals. A dodecagon has 54 diagonals. An octagon has 20 diagonals. A heptagon has 14 diagonals.
how many diagonals from a vertex a heptagon have